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  <title>Can be to be called whenever there are pending requests that need finishing</title>
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  <div id="layout-content"><div id="function.eio-poll" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">eio_poll</h1>
  <p class="verinfo">(PECL eio &gt;= 0.0.1dev)</p><p class="refpurpose"><span class="refname">eio_poll</span> &mdash; <span class="dc-title">Can be to be called whenever there are pending requests that need finishing</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.eio-poll-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>eio_poll</strong></span>
    ( <span class="methodparam">void</span>
   ) : <span class="type">int</span></div>

  <p class="para rdfs-comment">
  <span class="function"><strong>eio_poll()</strong></span> can be used to implement special event loop.
  For this <span class="function"><a href="eio_nreqs.html" class="function">eio_nreqs()</a></span> could be used to test if there are
  unprocessed requests.
  </p>

  <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para">Applicable only when implementing userspace event loop.</p></p></blockquote>

 </div>


 <div class="refsect1 parameters" id="refsect1-function.eio-poll-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.eio-poll-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
  If any request invocation returns a non-zero value, returns that value.
  Otherwise, it returns <strong><code>0</code></strong>.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.eio-poll-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-4282">
   <p><strong>Example #1 <span class="function"><strong>eio_poll()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">res_cb</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$result</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">eio_nop</span><span style="color: #007700">(</span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"res_cb"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"1"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">eio_nop</span><span style="color: #007700">(</span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"res_cb"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"2"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">eio_nop</span><span style="color: #007700">(</span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"res_cb"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"3"</span><span style="color: #007700">);<br /><br />while&nbsp;(</span><span style="color: #0000BB">eio_nreqs</span><span style="color: #007700">())&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">//&nbsp;Some&nbsp;specific&nbsp;IPC&nbsp;or&nbsp;so<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">eio_poll</span><span style="color: #007700">();<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
   </div>

   <div class="example-contents"><p>以上例程的输出类似于：</p></div>
   <div class="example-contents screen">
<div class="cdata"><pre>
string(1) &quot;1&quot;
int(0)
string(1) &quot;3&quot;
int(0)
string(1) &quot;2&quot;
int(0)
</pre></div>
   </div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.eio-poll-seealso">
  <h3 class="title">参见</h3>
  <ul class="simplelist">
   <li class="member">eio_nreqs</li>
  </ul>
 </div>


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